Shuttle and race mechanism for sewing-machines



M F.D.PARKER. SHUTTLE AND RACE MECHANISM FOR SEWING MACHINES. No. 404,555. Patented June 4, 1889.

gSA/TOR (UL/M XML 2' WITNESSES. 75% 104 ,v UNITED STATES PATENT OFFICE.

FRED D. PARKER, OF DENVER, COLORADO.

SHUTTLE AND RACE MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 404,555, dated June 4, 1889.

Application filed April 29, 1887. Renewed February 18, 1889. Serial No. 300,365. (ModeL) To all whom it may concern.-

Be it known that I, FRED D. PARKER, a citizen of the United States, residing in the city of Denver and county of Arapahoe, and State of Colorado, have invented a 'new and useful Improvement in Rotary or Oscillating Shuttles and RaceMechanisms for Sewing- Machines, of which the following is a specification.

My invention relates to a class of circular shuttles and races, and may be either rotary or oscillating in their action.

The object of my invention is to provide sewing-machines which use shuttle and race mechanisms of 'this class with such improvement as will obviate the choking or clogging of the machine in cases where the thread during the operation of the machine gets out of its proper province.

Referring to the accompanying drawings, which form a part of this specification, the invention consists of the following details of construction.

Figure. 1 shows the circular race in which the shuttle moves, the beveled shoulder K serving to assist in holding the shuttle in position within the race ,on the one side, and the race-ring, three views of which are represented in Fig. 2, helping to hold it in position on the other side. Fig. 3 shows four views of the shuttle-A, back plan; B, front plan; 0, view in perspective; D, edge elevation. M represents slots into which the shuttle-driver (not here shown) projects. Fig. 4 is a front elevation of the shuttle shown as taking the loop from the needle.

Up to the present time it has been a standing difficulty with sewing machines using this class of shuttles and races that when the thread engages with the shuttle in any other than the proper manner it is very liable to be drawn in and wedged between shuttle and race, thus stopping the machinery, because shuttles of this class are tight-fitting and do not admit of thread between themselves and race without pinching. Now, to obviate this trouble, I have located on the race-bearing portions of the shuttle and flush with its peripheral surface one or more knives P, in Fig. 3, and the office of these knives is to cut and force aside or out of the way the clogging thread wherever they strike it, thus freeingthe machine. I also cutout one or more notches Z on the peripheral or race-bearing portions of the shuttle, which notches or openings serve the purpose of storing bits of thread chopped off by the knives of the shuttle, thus rendering said bits of thread less lia ble to obstruct the shuttle in its subsequent revolutions.

To render the action of the knives more certain as a part of my invention, I use one or more cuts H in the race and race-ring, which are shown in Figs 1 and The edgesproduced by these cuts act as one of the blades of a pair of shears, the shuttle-knives acting as the opposite blade. These cuts H also provide a receptacle or lodging-place, for bits of thread which may be chopped off by the action of the shuttle. I prefer to set these knives at an angle similar to the position illustrated in views A D of Fig. 3. Furthermore, I use as a part of my invention a thread guard N, in combination with the knives P, the office of which is to guard the thread-loop in ordinary stitch-making from being cut with the shuttle-knives P. I

The front half-round portion of the shuttle point or loop engager constitutes the threadguard, an absence of which in my invention would be to allow the edge of the first knife to come in direct cutting contact with the thread of the loop.

Having described my invention, what I desire to claim and protect by Letters Patent 1s- 1. In a rotary or oscillating shuttle sewingmachine, a rotary or oscillating shuttle whose race-bearing surface is provided with one or more knives, in combination with the race having walls for engagement and co-operation with the knives 011 the shuttle, substantially as described, and for the purpose set forth.

2. In a rotary or oscillating shuttle sewingmachine, a rotary or oscillating shuttle whose race-bearing surface is provided with one or more knives, in combination with the threadg'uard N, and the race having walls for en gagement and co-operation with the knives on the shuttle, substantially as herein shown and set forth. v

. FRED F. HALL,

HOWARD S. BAILEY. 

